ITPS20100003A1 - METHOD TO MODIFY AND ADJUST THE DIRECTION AND SPEED OF THE LITHORAN MARINE CURRENT WHICH SLIDES IN THE PRESSES OF THE COAST - Google Patents

Description

"Method for changing and or adjusting the direction and or speed of the littoral sea current flowing near the coast",

The present invention relates to the method for modifying and or regulating the direction and or the speed of the coastal sea current which flows near the coast. The current models used to protect the coasts from erosion are based on the attenuation of the effect of the waves breaking on the beach.

The wave-based method of work does not always protect the beach from erosion, in fact it often causes it.

This wave-based working method totally ignores the presence of the coastal sea current.

By means of bathymetric surveys repeated over time of the seabed in front of the coast carried out also with the aid of hydrographic eddies and current meters, the importance of the coastal sea current on the morphology of the coast was found.

During storm surges there is a notable increase in the speed of this coastal sea current.

This littoral current cannot be confused with the currents generated by wave and tidal motion and is always present even when there is no wind or wave motion.

This coastal current maintains its direction almost unchanged over the course of time, while the speed and position may vary according to the seasons and storm surges.

This littoral current has an intrinsic large kinetic energy which varies according to the meteorological conditions.

This coastal current is responsible for the transport of sands and gravels along the coast until now attributed to the currents generated by the wave motion.

The new method described here is based on the modification or regulation of the direction and speed of the coastal sea current that passes near the coast with the aid of fixed or mobile or adjustable artifacts, or by means of the partial or total elimination of existing artifacts .

This method allows the improvement of existing marine structures carried out and designed with different methods, eliminating the structures that cause a serious marine and coastal environmental impact.

This method of modifying or regulating the littoral sea current treats the sea as an open fluid system.

Here are various examples of applications of this method:

to prevent and control coastal erosion;

to prevent the “silting up of ports;

to power a hydraulic turbine capable of producing energy;

to improve the quality of bathing water;

We describe the numbers that appear inside the drawings of each represented figure:

reference 1 indicates the beach or the coast or the mainland;

with reference 2 the sea is indicated;

reference 3 indicates the coastal marine current;

reference 4 indicates the coastal sea current deviated by the obstacle; the reference 6 indicates the coastal sea current leaving the erosion zone;

the reference 7 indicates Î “fixed obstacle (cliff, pier, brush cliff};

Reference 3 indicates the eroded beach area;

reference 10 indicates the area of accumulation of sand due to the presence of the obstacle in which the motion of the coastal sea current is slowed down;

reference 11 indicates the coastal sea current that passes through gaps between obstacles;

the reference 12 indicates the area that is eroded on the seabed after Î "opening of a passage in the <1> obstacle;

reference 13 indicates the area of accumulation of sand due to the slowdown of the coastal sea current leaving the erosion zone; the reference 14 indicates the area of accumulation of sand due to the slowing of the coastal sea current caused by the pier;

reference 15 indicates the area that is eroded on the seabed following the acceleration of the coastal sea current due to the presence of the obstacle;

reference 16 indicates an added obstacle with the aim of creating an opening to accelerate the coastal sea current and at the same time to protect the entrance to the port from wave motion;

reference 13 indicates the speed of the littoral sea current leaving a device for converting the kinetic energy (possessed by the sea water of the littoral sea current itself) into electrical energy;

reference 19 indicates a device for converting the kinetic energy possessed by sea water of the coastal sea current into other forms of energy including electrical energy (for example a propeller turbine connected to an electric alternator);

reference 20 indicates the previous shoreline alt intervention of modification of the littoral sea current;

with reference 21 it is indicated ia shoreline;

reference 22 indicates the sand deposit behind an obstacle (cliff) that emerged;

the reference 23 indicates the surface of the sea seen in section;

reference 24 indicates the bottom of the sea seen in section;

reference 25 indicates the section line for the representation of the section view with the relative projection arrow;

reference 26 indicates an opening opened in an obstacle (cliff) or envisaged in the project;

references 27, 28, 29, 30, 31 indicate obstacles (deflectors) which have been designed to divert the coastal sea current;

with reference numbers 32, 33, 34, 35, 36, 37 the branches of the coastal sea current separated by the deflectors are indicated;

reference 39 indicates a gate capable of intercepting the hydraulic flow of the coastal sea current;

reference 40 indicates a hydraulic cylinder capable of operating the gate 39 of Fig, 31 and Fig, 32 or the sliding doors 45 of Fig, 33 and Fig. 34;

reference 41 indicates the flow of coastal sea current regulated by a suitable device (for example the gate 39 of Fig. 31 and Fig. 32 or of the sliding doors 45 of Fig. 33 and Fig. 34);

reference 42 indicates the regulation and control system of the gate 39 of Fig. 31 and Fig. 32 or of the sliding doors 45 of Fig. 33 and Fig. 34 or of a similar device;

the reference numbers 43, 44 indicate the sensors that detect the inlet and outlet speed of the coastal sea current that passes through the gate 39 of Fig. 31 and Fig. 32 or of the sliding doors 45 of Fig. 33 and Fig. 34 and which are connected to the control, regulation and control system 42;

reference 45 indicates a sliding portelione capable of intercepting the hydraulic flow of the coastal sea current;

Reference 46 indicates the sliding rails of the sliding gate 45;

reference 47 indicates the adjustable opening through which the water of the coastal sea current flows, which passes following the opening or closing of the sliding doors 45 or the opening or closing of the gate 39;

reference 48 indicates the regulation system of the littoral sea current described in Fig. 33 and Fig, 34 or equivalent;

reference 49 indicates the regulation system of the coastal sea current 3 and production of electrical energy described in Fig. 39 and Fig. 40; the reference number 50 indicates the entrance to a port;

the reference number 51 indicates the sea area reserved for bathing.

reference 52 indicates a sand nourishment;

the reference 53 indicates a submerged sand dune;

with reference 54 a hole in the sea bed is indicated.

The invention is now described in detail, with reference to the figures of the attached drawings, which illustrate, by way of non-limiting example, a possible embodiment thereof.

Fig. 1 and Fig. 2 are real bathymetric reliefs where the geometries of the seabed are represented in plan and in section.

The hatched areas in the plans and sections indicate where the coastal sea current flows 3.

The vectors shown inside the hatched areas in plan in Fig. 1 and Fig. 2 indicate the direction and direction of the coastal sea current itself.

Fig, 1 represents a marine area free from cliffs, while Fig. 2 represents a marine area in which emerged cliffs have been built to protect the coast from wave motion.

Fig. 3 and Fig. 4 schematically represent an emerged reef built for some time to stop the wave motion and protect the nearby beach.

In particular, Fig. 4 is the plan view and Fig. 3 is the sectional view represented by the section line 25 of Fig. 4.

The actual state is that the coastal current 3 passes between the cliff 7 and the beach 1 accelerating 11 and causing the hole 15 and the erosion of the beach 8.

The result is that instead of creating a protection against erosion, the work has practically devastated a stretch of coast.

Fig, 5 and Fìg. 6 schematically represent the same delta sea area Fig. 4 where the cliff 7 has been removed in accordance with the method proposed here to modify the direction and or the speed of the littoral sea current that passes near the coast.

In particular, Fig. 6 is the plan view and Fig. 5 is the sectional view represented by the section line 25 of Fig. 6.

As can be seen from Fig. 5 and Fig. 6 the coastal sea current 3 is regularized in direction and speed, the eroded area on the seabed 15 and the eroded beach area 8 are filled with sand after a lapse of time.

This example highlights the effectiveness of the method described here which bases its action not on the attenuation of the wave motion but on the correct use of the coastal sea current.

Fig. 7 and Fig. 8 schematically represent an emerged cliff 7 called a brush built for some time to stop the erosion caused by the wave motion.

In particular, Fig, 8 is the plan view and Fig. 7 is the sectional view represented by the section line 25 of Fig. 8.

The state of affairs is that the coastal current 3 breaking against the brush 7 splits in two into two branches: one 4 that goes back causing Î "erosion of the beach 8 and Î ̄ 'accumulation of sand 13, Î" other 4 that it passes into the sea of the brush 7 causing the hole 15, Î “erosion of the beach 8 and settling itself 3 after a certain path.

On the sides close to the brush and the beach there is an accumulation of sand 10. The result is that instead of creating a protection against erosion due to wave motion, it has practically devastated two stretches of coast.

The best result is the removal of the brush which would regularize the coastal current but since this is often not possible, as the structure has human uses other than mere erosion protection, it represents a solution capable of improving the system.

Fig, 9 and Fig 10 schematically represent the same sea area of Fig, 8 where a gap has been created in the cliff 7.

In particular, Fig. 10 is the plan view and Fig. 9 is the sectional view represented by the section line 25 of Fig. 10.

The coastal current 3 breaking against the brush 7 splits into two branches: one 4 that tumbles back causing Î "erosion of delta beach 8 and Î" accumulation of sand 13, Î "other 11 that crosses the opening 26 causing hole 12 and I 8 "beach erosion and 3 regularization after a certain path.

On the sides close to the brush and the beach there is an accumulation of sand 10. The result is that the work improves the erosion compared to the intact brush as can be seen from the difference between the current shoreline 21 and the 20 which represents the shoreline of the example of Fig, 8.

Fig. 11 and Fìg, 12 schematically represent the same sea area of Fìg. 10 where the gap 26 in the cliff 7 has been widened.

in particular Fig. 12 is the plan view and Fig. 11 is the sectional view represented by the section line 25 of Fig. 12.

The coastal current 3 continues through the opening 26 causing the hole 12 and settling 3 after a certain path.

The result is that Î "work further improves Î" erosion compared to the example of Fig. 10.

Fig. 13 and Fig. 14 schematically represent the entrance to a port 50.

In particular, Fig. 14 is the plan view and Fig. 13 is the sectional view represented by the section line 25 of Fig. 14.

The state of affairs is that the coastal current 3 breaking against the pier 7 splits in two into two branches: one 4 that goes back causing the erosion of the beach 8 and I <*> accumulation of sand 13, Î "more 4 which passes into the sea from pier 7 causing hole 15, sediment deposit 14, erosion of beach 8 and settling 3 after a certain path.

On the external sides close to the two piers 7 and the beach there is an accumulation of sand 10.

The result is that the necessary work for the boats creates a considerable deformation of the two adjacent edges of the coast and the silting up of the mouth of the canal which involves dredging costs.

An improvement is shown in Fig, 15 and Fig. 16 where an artifact 16 was added to the first pier 7 encountered by the coastal stream 3.

In particular, Fig. 16 is the plan view and Fig, 15 is the sectional view represented by the section line 25 of Fig. 16.

The coastal current 3 continues through the opening 26 causing hole 12, causing erosion 8 of the beach and settling 3 after a certain path.

On the external sides near the two piers 7 and the beach there is an accumulation of sand 10.

the result is that Î "opera further improves I <*> erosion with respect to the example of fig, 14 avoiding Î" accumulation of sand 14 at the entrance to the port.

This use of the method to change the direction and speed of the coastal sea current that passes near the coast applied to the mouths of the ports involves an enormous saving of money as well as limiting the erosion of the coast.

Fig. 17 and Fig, 18 schematically represent a structure to stop erosion due to waves.

In particular, Fig. 18 is the plan view and Fig. 17 is the sectional view represented by the section line 25 of Fig. 18.

The state of affairs is that the coastal current 3 breaks against the pier 7 splits in two into two branches: one 4 that comes back causing Î "erosion of the beach d and the accumulation of sand 13, the other 4 which splits into turn into two branches that lap the isolated cliff 7 causing two holes 15 on the seabed and an accumulation of sand 13 and then one erodes the beach 8, rejoining with Î "another branch, continue together eroding the beach 8 and then continue and stabilize 3 after some distance. On the external sides near pier 7 there is an accumulation of sand 10,

The result is that the work designed to protect a beach area from the erosion of wave motion is in practice responsible for a considerable deformation of the adjacent coast.

An improvement is represented in the Fìg. 19 and Fig. 20 where pier 7 has been eliminated.

In particular, Fig. 20 is the plan view and Fig. 19 is the sectional view represented by the section line 25 of Fig. 20.

The coastal current 3 continues almost undisturbed, regularizing the shoreline 21. It is possible to compare the evolution of the beach 21 and 20.

Fig. 21 and Fig. 22 schematically represent the evolution after a time rate of the emerged reef system 7 designed with the wave method to protect a stretch of coastline 1 from wave erosion.

In particular, Fig. 22 is the plan view and Fig. 21 is the sectional view represented by the section line 25 of Fig. 22.

The emerged cliffs 7 cause a progressive accumulation of sand 22 on the landward side.

This accumulation 22 of sand which was indirectly caused by the cliffs 7 alters the flow of the coastal sea current 3 which forks into two branches; one that continues 6 undergoing a bending towards the beach and causing Î "erosion 8, Î" other that deviates outside the central cliff 7 and then returns to the first free passage causing hole 15 in the seabed continuing and contributing to the erosion 8 of the beach to then rejoin the previous flow stabilizing in the current 3 after a certain path.

Whenever the cliffs 7 are more numerous than those shown, the eroded sand 8 settles behind other cliffs, contributing to the continuation of the mechanism described above.

The solution to the problem is to completely eliminate the cliffs 7 so that the littoral current 3, stabilizing, allows to recreate the continuity of the coast.

Another solution is to lower the cliffs 7 to medium sea level so that the wave motion can discharge its kinetic energy on the accumulation of sand 22 which, raised in suspension in the water, is carried away by the sea current. coastal road 3.

Fig. 23 and Fig. 24 schematically represent the same sea and coast area of Fig. 22 where all the cliffs 7 have been eliminated.

In particular, Fig. 24 is the plan view and Fig. 23 is the sectional view represented by the section line 25 of Fig. 24.

It is noted how the seabed 24 and the beach 21 have become regularized and the coastal sea current proceeds undisturbed.

Fig. 25 and Fig. 26 schematically represent a submerged reef built to completely protect a beach area from erosion and encloses a stretch of sea reserved for bathing 51.

In particular, Fig, 26 is the plan view and Fig. 25 is the sectional view represented by the section line 25 of Fig. 26.

The state of affairs is that the coastal current 3 breaking against the brush barrier 7 splits in two in two branches: one 4 that comes back causing Î "erosion of beach B and the accumulation of sand 13, Î" more 4 which passes into the sea of the cliff 7 parallel to the coast causing holes 15, Î "erosion of the beach 8 and settling 3 after a certain path,

the result is that Î “opera protects only the beach inside the cliffs from erosion while the outer beach areas are eroded. The seabed enclosed by the cliffs is no longer subjected to water exchange and is rich in silts and muds which, remaining retained, make bathing not pleasant especially in the summer.

Fig. 27 and Fig. 28 schematically represent the same sea area of Fig. 26 where the cliffs 7 perpendicular to the beach have been eliminated.

In particular, Fig. 28 is the plan view and Fig. 27 is the sectional view represented by the section line 25 of Fig. 28.

The result is that the work improves erosion compared to the case with reef in Fig. 26, the silts and muds deposited are removed from the coastal sea current, improving the bathing water and the seabed.

Fig. 29 and Fig. 30 schematically represent an example of Fig. 7 and Fig. 8 where deflectors 27, 28, 29, 30 and 31 have been added, capable of diverting the flow of the coastal sea current 3 with the aim of limiting the erosion of the beach 1 around the cliff 7.

In particular, Fig. 30 is the plan view and Fig. 29 is the sectional view represented by the section line 25 of Fig. 30.

The coastal sea current 3 is diverted by the deflector 27, here it forks into two branches: one 37 which passes in the opening between the deflector 27 and the brush reef 7 is diverted by the deflector 28 and then rejoins the main flow of the current 3 and Î "other 4 that continues towards I <*> extremity of the cliff at permeation 7, causing hole 15 on the seabed, continues deviated 6 beyond the brush 7 and here forks into two branches: one 32 that passes into the opening between the brush 7 and the deflector 29 and the other 33 which laps the deflector 29 externally.

The current 32 forks into two branches: one 34 which passes through the opening between the deflector 31 and the deflector 30 and the other 35 which laps externally on the deflector 30.

The two current branches 33 and 35 join together in the current branch 36.

The two current branches 36 and 34 meet in the current branch 3 which represents the natural continuation of the coastal sea current.

With the addition of the deflectors 27, 28, 29, 30 and 31, an improvement in the erosion of the beach surrounding the cliff 7 is highlighted, as shown by the comparison of the line of the beach 21 and the previous 20.

Fig. 31 and Fig. 32 represent a way to vary and regulate the speed of the coastal sea current 3 by making it flow through an adjustable gate 39 operated by automatic means 40 and 42.

In particular Fig. 32 is the plan view and Fig. 31 is the sectional view represented by the section line 25 of Fig. 32,

The gate 39 is mounted in an opening 26 obtained in a pier 7 anchored to the ground 1.

The gate 39 is operated by a hydraulic cylinder 40 controlled by a regulation and control system 42 to which are connected the sensors 43 and 44 which detect the inlet and outlet speed of the sea current passing through the gate 39.

This system for varying and regulating the speed of the coastal sea current 3 making it flow through an adjustable gate 39 has various applications, of which we can mention the regulation of the flow of the current at the entrance to a channel port to remove the sand and debris that accumulate at the mouth.

Fig. 33 and ia Fig. 34 represent a possible variant of the gate shown in Fig. 31 and Fig. 32 where sliding doors 45 on rails 46 integral with the pier 7 are operated by hydraulic cylinders 40 in turn controlled by a system control and control command 42, equipped with sensors 43 and 44, similar to that shown in Fig. 31 and Fig. 32. These sliding doors 45 open and close, regulate the hydraulic flow that passes through the opening 47.

Fig. 35 and Fig. 36 represent a way to vary the speed of the coastal sea current 3 by making it flow through an opening 26 open in a pier 7 attached to the mainland 1

In particular, Fig. 36 is the plan view and Fig. 35 is the sectional view represented by the section line 25 of Fig. 36.

A conversion device 19 is inserted in the passage to produce electrical energy starting from the kinetic energy of the coastal sea current 3 (for example a propeller turbine connected to an electric alternator).

The coastal sea current 3 reached near the opening 26 opened in the pier 7 accelerates 11, gives energy to the conversion device 19 and exits from this slowed down 18.

Notice !' erosive effect 12 on the seabed produced by the flow 11

This system is one of the most effective methods for reducing the speed of the coastal sea current 3.

The energy carried by the coastal sea current is considerable and is capable of being converted into large quantities of electricity.

The really interesting fact is the possibility of producing large quantities of electricity close to the sea shore, something that has been possible until now only by exploiting the offshore sea currents which are very different from the coastal sea current and which require enormous investments.

Fig. 37 and Fig. 38 represent the same situation as Fig, 35 and Fig. 36 where however the pier 7 is shaped as a converging conduit to improve the inlet flow to the device 19 of the coastal sea current 3.

In particular, Fig. 38 is the plan view and Fig. 37 is the sectional view represented by the section line 25 of Fig. 38.

Fig. 39 and Fig. 40 represent Î "union of the example represented by Fig, 33 and Fig. 34 with Î" example represented by Fig.35 and Fig. 36.

In particular Fig. 40 is the plan view and Fig. 39 is the sectional view represented by the section line 25 of Fig. 40,

It is thus possible to use the conversion device 19 adapted to produce electrical energy starting from the kinetic energy of the coastal sea current 3 (for example a propeller turbine connected to an electric alternator) even in the presence of storms because the device 48 allows regulate the speed of the littoral sea current 3 so as to make the device 19 work. This system allows electricity to be produced throughout the year, especially in those moments when energy itself abounds, such as in sea storms. It is always pointed out that pier 7 is attached to coast 1 and that therefore device 19 is fixed to coast 1 by means of pier 7.

Fig. 41 and Fig. 42 represent the application of the example of Fig. 39 and Fig. 40 to an inlet of a port 50.

In particular, Fig. 42 is the plan view and Fig. 41 is the sectional view represented by the section line 25 of Fig. 42.

device 49 is mounted on opening 26 of pier 7.

The coastal sea current 3 enters the opening 26 of the pier 7 and is regulated and exploited by the device 49 and comes out slowed 16.

On its way it causes Î “erosion of the seabed 12 preventing the entrance of the harbor from silting up.

This example has countless advantages: elimination of the sand accumulated at the harbor entrance, adjustment to the various weather and sea conditions of the coastal sea current 13 coming out of the device 49 and production of electricity throughout the year, especially during storms and scarce erosion of the coast 1 in the area surrounding the port.

Fig. 43 and Fig. 44 show a part of beach 1 in which an eroded area has been restored with a sand repaint 52.

In particular, Fig. 44 is the plan view and Fig. 43 is the sectional view represented by the section line 25 of Fig. 44.

The nourishment was carried out without knowing the causes that cause erosion. Therefore the cause persists.

Fig. 45 and Fig. 46 represent the same sea area of Fig. 44 in which nourishment has been displaced by the persistence of erosive causes, creating a submerged dune 53.

In particular, Fig. 46 is a plan view and Fig. 45 is the sectional view represented by the section line 25 of Fig. 46.

The submerged dune 53 is an obstacle to the coastal sea current 3.

Fig. 47 and Fig. 48 represent the same sea area of Fig. 46 in which the coastal sea current 3 is separated in two branches 4 by the submerged dune 53: one that passes between the dune 53 and the beach 1 and Î "other that passes outside the dune 53 causing both Î" erosion 8 to then rejoin the current 6 and stabilize after a certain stretch in the current 3,

In particular, Fig. 48 is the plan view and Fig * 47 is the sectional view represented by the section line 25 of Fig. 48.

A nourishment of sand in an eroded area is useless and harmful if the cause of the erosion, which is often distant, is not first removed.

To remove the erosion 8 caused by the dune it is necessary to remove the submerged dune 53.

Fig. 49 and Fig. 50 represent a part of the beach 1 where there are no erosive phenomena and the coastal sea current 3 is regular.

In particular, Fig. 50 is the plan view and Fig. 49 is the sectional view represented by the section line 25 of Fig. 50.

Fig. 51 and Fig. 52 show the same sea area as Fig. 50 where a hole 54 has been dug in the seabed by a dredge. The hole 64 acts as an obstacle during a sea storm since eddies are created inside the hole which divide the coastal sea current 3 into two branches 4: one that passes between hole 54 and beach 1 and Î "other which passes outside the hole 54, causing both Î “erosion 8 to then rejoin the current 6 and stabilize after a certain stretch in the current 3.

In particular, Fig. 52 is the plan view and Fig. 51 is the sectional view represented by the section line 25 of Fig. 52.

To eliminate the erosion 8 of beach 1 it is necessary to fill hole 54 with material similar to Guelph from the area surrounding hole 54 itself.

In the figures described, the flows of currents are expressed as an indication and may have different paths without affecting the validity of the method in question. It is clear that the method proposed here for modifying and or regulating the direction and or speed of the coastal sea current flowing near the coast will bring countless advantages from an environmental and economic point of view. The environment will improve following the removal of harmful and disfiguring marine artifacts. Only useful and effective marine structures will be built, improving areas now disfigured by erosion. An enormous quantity of clean, renewable, eco-compatible, eco-sustainable energy will be produced, without emissions of carbon dioxide and other harmful gases.

Claims (1)

CLAIMS 1. Method for modifying and or adjusting the direction and or speed of the littoral sea current (3) flowing near the coast (1) characterized by the fact that the modification and or adjustment of the direction and or speed of the littoral sea current (3) which flows near the coast (1) occurs by means of one or more of the following actions: partial or total elimination of natural {53} or artificial (7) obstacles emerged or submerged or artificial submerged (54), arranged in the flow of the coastal sea current {3} or in its vicinity; insertion of fixed (16}, (27), (28), (29), {30), (31), emerged or submerged, and or mobile (52) artifacts arranged in the flow of the coastal sea current or in its vicinity ; insertion of devices (39), (45) equipped with actuators (40) and command, regulation and control systems (42), (43), (44) in openings (26) created in artifacts (7) arranged in the flow of current coastal marine (3) or in its vicinity that intercept the current (3), which, flowing through the adjustable opening (47), exits regulated (41); insertion of devices (19) in openings (26) created in artifacts {7} integral with the coast (1) arranged in the flow of the coastal wind current (3) or in its vicinity which intercept the current (3), which, by giving energy to the device (19), it exits slowed down and or regulated (18), 2. Method as in claim 1 where the modification of the direction and speed of the littoral sea current (3) serves to prevent and or control the erosion of the coast (1) and of the coast. seabed (24). Method as in claim 1 where the modification of the direction and speed of the littoral sea current (3) serves to prevent and or control the silting up of a harbor entrance (50). 4. Method as in claim 1 where the modification of the direction and or speed of the coastal sea current (3) serves to power a device (19) capable of producing electrical energy. Fundamental for this claim is that the artifact (7) equipped with an opening (26) inside which the device (19) is mounted is integral with the coast (1). 5. Method as in claim 1 where the modification of the direction and speed of the littoral sea current (3) serves to improve the quality of the bathing water (51). 6. Method such as claims 2, 3, 4 and 5 or the combination of more of them allows the creation of a state-of-the-art marine structure capable of: eliminating the silting of ports, reducing erosion due to the port itself on the surrounding coast , produce clean electricity and improve bathing waters.